Logic: The letters with the word are written in the reverse order to obtain the given code. 
COURSE → ESRUOC
In similar way, 
BREATH → HTAERB

Hence, option B is the correct response.

Clearly, PSQ is different from others.

Logic : figure is rotating 90 degree clockwise in each step.

After carefully observing the figures given in the question, it is very clear that the answer figure (D) will be the next figure.

Logic : The coded letters are obtained by applying the pattern as shown below, also +1 is added to each letter to obtain the coded letter.

So, TRAINING is coded as HOJOJBSU.

Refer to the table:

Given expression is : 42 R 2 S 29 P 4 Q 8 = ?
After interchanging- (Apply BODMAS)
⇒ 42 ÷ 2 + 29 – 4 × 8 
⇒ 21 + 29 – 4 × 8
⇒ 21 + 29 – 32
⇒ 50 – 32 = 18

As per the above diagram, clearly the lady is Amit's wife.

Except 8 – 21, in all other pairs, 2^nd number = (1^st number × 4) – 10.
From the given options , 
7 × 4 = 28 ⇒ 28 - 10 = 18
3 × 4 = 12 ⇒ 12 - 10 = 2
9 × 4 = 36 ⇒ 36 - 10 = 26

Except 'Apple', all others that is cold drink, juice & energy drink is consumed in liquid form.

Column 1: (119 + 49) × 3 = 504

Column 2: (55 + 123)× 3 = 534

Column 3: (42 + 99) × 3 = 423

So, Missing Number is 49.

In a plane mirror, a mirror image is a reflected duplication of an object that appears almost identical, but it is reversed in the direction perpendicular to the mirror surface. As an optical effect it results from reflection of substances such as a mirror or water.