In all other groups, first and third letters are equidistant from the middle letter as in the alphabet.

In all other groups , number at the end is half of the position of sum of first and second letters in the alphabet. Except option (c), all are following a certain rule alphabet. except option (c), all are following a certain rule

Because ' Intestines' are inside the body.

In all pairs except (d), first is a tool which works on second.

Except 'HJMPT', all three are same and having difference in increasing order.

Only '48' is not square of any number.

Only in option (d) second number is twice of first number

According to the given information,
(a) DIRAMLOG - MARIGOLD
(b) ERENIGEN - ERENIGEN
(c) UIHCSSBI - HIBISCUS
(d) AFOLDFID - DAFFODIL
All except 'ERENIGEN' are related to the 'flowers'.

According to the given information,
(a) RARCTO - CARROT
(b) NIATCRU - CURTAIN
(c) BACEGEBA - CABBAGE
(d) ILBJARN - BRINJAL
Except 'Curtain' all others are vegetables.

According to the given information,
(a) LPAEP - APPLE
(b) YAPAP - PAPAYA
(c) AVGAU - GUAVA
(d) SRAHDI - RADISH
Except 'RADISH' all others are fruits while Radish is vegetable.