Select the odd word/letters/number/number pair from the given alternatives.

Select the odd word/letters/number/number pair from the given alternatives.

Select the odd word/letters/number/number pair from the given alternatives.

Select the related word/letters/number from the given alternatives.

37 : 21 : : 29 : ?

Select the related word/letters/number from the given alternatives.

JKL : LKJ : : YZA : ?

Select the related word/letters/number from the given alternatives.

XYZ : CBA : : QRS : ?

Select the related word/letters/number from the given alternatives.

Traditional : Modern : : Sharp : ?

I go on four legs in the morning, on two legs at noon, and on three legs in the evening. What am I?