Herbicide A and herbicide B was applied on plot I and

In the following question, select the related letters from the given alternatives.

PTX : RVZ :: CGK : ? 

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

(4, 2, 6)

(9, 3, 9)

 A is taller than B but shorter than C. D is shorter than A but taller than B. Who is the tallest?

Select the letter-cluster that can replace the (?) in the following series.

DEB, IJG, NOL,   ?,   XVV      

What will come in place of '?' in the following equation, if '+' and '–' are interchanged and '×' and '÷' are interchanged. 

Select the option that is related to the third word in the same way as the second word is related to the first word.

Hibiscus : Flower : : Penguin : ?

A question is given, followed by three statements labelled I, II and III. Identify which of the statements is/are sufficient to answer the question.

'I × J' means 'I is the mother of J'

'I + J' means 'I is the husband of J' 

'I ÷ J' means 'I is the sister of J' 

Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster.