Which of the following chemical is used for polyploidy

In a certain code language, ‘GOLF’ is coded as ‘1286’ and ‘WOLF’ is coded as ‘6428’. What is the code for ‘W’ in that language? 

Which two numbers and two signs should be interchanged in the following equation to make it correct?

4 + 2 ÷ 7 + 8 × 9 = 25

'A + B' means 'A is brother of B'

'A – B' means 'A is mother of B'

'A × B' means 'A is husband of B'

Select the option figure which is embedded in the given figure as its part (rotation is NOT allowed).

If ‘R @ S %T & U # V’, then how is R related to U?

Select the set in which the numbers are related in the same way as are the numbers of the given sets.