Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.

d_ _td_s_d_st

Select the option that is related to the third number in the same way as the second number is related to first number.
19 :400 :: 24 :___

Mohan is taller than Rohan but shorter than Farhan. Kannan is shorter than Mohan but taller than Rohan .Shankar is taller than Rohan and Farhan. Who is the tallest?

Funk: Vitamins: Curie: ? 

Five friends are sitting on a bench facing the north. Ankit is sitting to the immediate right of Anjum. Amit is sitting to the left of Priya and to the immediate right of Ram. Ram is sitting to the right of Ankit. Who is sitting at the extreme right end?

Three-position of a dice are given below. Identify the number on the face opposite to 6.

Arrange the following words in the order of the dictionary-
1. Chemistry
2. Chamber
3. Cheap
4. Cheerful

Choose the correct option to complete the following pattern.