Thorogh is the incorrect spelling of thorough which means complete with regard to every detail; not superficial or partial. 

Termynus is the incorrect spelling of terminus which is the end of a railway or other transport route, or a station at such a point; a terminal. 

Adherant is the incorrect spelling of adherent who is someone who supports a particular party, person, or set of ideas. 

Brazened is the correct spelling which means to endure an embarrassing or difficult situation by behaving with apparent confidence and lack of shame. 

Hence, option B is the correct option.

Option D has the correctly spelt word. "Antiseptic" means a chemicalused for preventing infection in an injury, especially by killing bacteria.

Option D is incorrectly spelt. The correct spelling is "contortion" which means a bent position or shape.

The meanings of other words are:

Intransigence=> stubborn refusal to compromise or change 

Burgeon=> grow and flourish 

Meretricious=> attractive in a showy or cheap way

Option D has the incorrectly spelt word. Its correct spelling is "apoplectic" which means incredibly angry. The meaning of the other words are as follows:

Amatory = relating to or induced by sexual love or desire.

Bawdy = indecent; obscene

Persistent = lasting for a long time or difficult to get rid of

Option D has the incorrectly spelt word. The correct spelling of the word is secretariat. It is a permanent administrative office or department, especially a governmental one. Other words are:

Parliament=  it is the highest legislature. 

Woollen = It is something made wholly or partly of wool. 

Beginning= it is the point in time or space at which something begins. 

Option C has the correctly spelt word. Accommodation means a room, group of rooms, or building in which someone may live or stay.

Option A has the misspelt word. Its correct spelling is ‘ostensible’ which means ‘stated or appearing to be true, but not necessarily so'. The meanings of the other words are:

Augmentation = the action or process of making or becoming greater in size or amount.

Flustered = make (someone) agitated or confused.

Grudge = a persistent feeling of ill will or resentment resulting from a past insult or injury.

Option C has the misspelt word. Its correct spelling is ‘overweening’ which means ‘showing excessive confidence or pride’. The meanings of the other words are:

Intrude = put oneself deliberately into a place or situation where one is unwelcome or uninvited.

Lightening = a drop in the level of the uterus during the last weeks of pregnancy as the head of the fetus engages in the pelvis.

Gravitas = dignity, seriousness, or solemnity of manner

‘Pedestrian’ is the correct spelling word which means a person walking along a road or in a developed area.

The correctly spelt word is 'indigenous'. It means native; belonging to a particular place.