Which of the following statement is not correct

What will come in the place of the question mark (?) in the following equation, if '+' and '-' are interchanged and 'x' and ' are interchanged?

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

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.

17 * 4 * 6 * 2 * 4 = 9

P, Q, S, T, X and Y are six family members. S is the son of Y's sister T. Q is the daughter of P's child X. X and T are couples. How is Q related to Y?

Select the option that represents the correct order of the given words as they would appear in an English dictionary.

1. Refinery

Select the missing characters from the given responses.

BADC : FHEG :: NPMO : ?

Select the Venn diagram that best represents the relationship between the following classes.

Blue, Water, Star

'A + B' का अर्थ है 'A, B का भाई है'

'A – B' का अर्थ है 'A, B की माँ है'