● Southernmost point of the Peninsular Plateau is marked by Nilgiri hills.

● This plateau consists of two broad divisions

1) Central Highlands

2) Deccan Plateau

● The Deccan Plateau is the largest plateau of India and Ladakh plateau is the highest plateau of India.

By checking option A:
Given expression is-
6 + 9 × 2 - 3 ÷ 4 = 8
After interchanging-
6 + 9 × 2 ÷ 3 - 4 = 8
Solve now,
6 + 9 × 2 ÷ 3 -  4
= 6 + 6 - 4
= 12 - 4 = 8 
8 = 8 (L.H.S = R.H.S)
As we got the correct option, so we do not need to check more options.

Hence, the correct answer is option A.

Given, The proportion of the number of students in three classes is 1 : 2 : 3

Let, The number of students in three classes are x, 2x and 3x.

According to the question,

x + 20 : 2x + 20 : 3x + 20 = 3 : 5 : 7

⇒ (x+20)/(2x+20) = 3/5

⇒ 5(x + 20) = 3 (2x + 20)

⇒ x = 40

∴ The total number of students in the three classes initially

= 40 + 2×40 + 3×40 = 240

Speed = Distance/Time

⇒

⇒ Distance = 0.7 km

∴ Required time =  min = 1.5 min

● Ticks on Dog represents a parasitic relationship.

● The parasite lives on or in the body of the host.

● A parasitic relationship is one in which one organism, the parasite, lives off of another organism, the host, harming it and possibly causing death.

● Isobars are atoms of different chemical elements that have the same number of nucleons (protons + neutrons). Isobars differ in atomic number (or number of protons) but have the same mass number.

● Isotopes are various forms of an element that have the same number of protons but a different number of neutrons. Isotopes differ in mass number but have the same atomic number.

• India's First Solar-Powered Miniature Train has been launched in Kerala.

• The miniature rail has all the features of a fully- equipped rail system, including a tunnel, station and a ticket office.

• The train has three bogies that can accommodate around 45 people at a time.

• The total cost of this project is about ₹10 crore.

* On March 27, 2021, a new passenger train named "Mitali Express" was launched between India and Bangladesh.

* It was jointly inaugurated by the Indian Prime Minister Narendra Modi and Bangladesh Prime Minister Sheikh Hasina.

* The train will run between Dhaka Cantonment and New Jalpaiguri in West Bengal via Chilahati, a border railway station in Bangladesh.

* This is the third passenger train after Maitree Express (Dhaka-Kolkata) and Bandhan Express (Khulna-Kolkata).

● Cash Reserve Ratio is a percentage of demand and time liabilities that every bank has to retain in cash with the RBI.

● A reduction in CRR leads to more liquidity in the system as the banks have to park fewer funds with the Central Bank. Also, under inflationary conditions, a reduction in CRR leads to more money in the system.