(C) on, at 

The preposition "on" is used correctly to indicate that the award was conferred upon Mary Kom. The preposition "at" is used correctly to indicate the location of the ceremony.

(B) Bright

The word "bright" accurately conveys the idea that Rahul's chances of selection are high even after poor performance.

(D) Dissociate

The analogy is based on the relationship between antonyms. "Cover" is the opposite of "uncover," and similarly, "associate" is the opposite of "dissociate."

Answer: (D) Officials hope that the food-grain production target will be met due to a good rabi produce.

The passage clearly states that officials believe the loss in kharif crop production can be recovered through a good rabi crop yield. This indicates their hope that the overall food-grain production target can be achieved with a successful rabi season.

• Sum of the first n natural numbers = n(n+1)/2

• Sum of the first 2n natural numbers = 2n ( 2n +1 )/ 2 = 2n 2 + n

• Sum of the first n odd natural numbers = n2

Therefore, the difference = n 2 + n

Answer: (B)

If the repo rate increases then banks will get money from RBI at a higher interest rate. When a bank lends that money to its customer, it will charge a higher interest rate. Hence the cost of borrowing to customers will increase.

If the repo rate decreases, the cost of borrowing will decrease. Once cost of borrowing decreases more customers will take money from banks hence lending from commercial banks will incease.

Answer: (D)