Which is NOT a benefit of crop rotation in organic

Five words have been given, out of which four are alike in some manner and one is different. Select the odd one.

Ear, Leg, Heart, Kidney, Hand

If a mirror is placed on the line XY, then which of the answer figures is the mirror image of the given figure?

Five to four in the following are similar in a certain way, so a group is formed.

Which of these is not related to this group?

RNJ, LHD, KGC, MIE, PKF

Which of the following letter-number cluster will replace the question mark (?) in the given series? 

UDF6, VF19, ?, XJO15, YLR18, ZNU21 

If + means −, − means ×, × means ÷ and ÷ means +, then what will come in place of the question mark (?) in the following equation?

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

27 ∶ 702 ∶∶ 12 ∶ ?

In the given question, choose the term that is odd one out from the given set.

F1, H5, J10, L16, N23, Q30, R40

Which number will replace the question mark (?) in the following number series?

2, 3, 6, 10, 17, ?