When is 'World Radiography Day' celebrated every year?

Who has recently become the new Chief Information Officer (CIO) of HDFC Bank?

Recently, who has won the JCB Literary Award?

Who has recently become the new CEO of Petronet LNG Limited?

If A = 1, P = 2, L = 3, E = 4, T = 5 and S = 6, then a series of the following letters does not make a meaningful word. Find it?

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

6 years ago, Raju's age was 2 years less than half of his brother's age, which was 20 years. What is his present age?

What will come in place of question mark(?) in the following number series?

A5, C10, E15, G20, ?