ssc previous year one word substitution

STUDY {A study of-->}

Matching exercise

Match the items on the right to the items on the left.

HELMINTHOLOGY	??? plant tissues worms water fish clock making
HIROLOGY	??? plant tissues worms water fish clock making
HISTOLOGY	??? plant tissues worms water fish clock making
HYDROLOGY	??? plant tissues worms water fish clock making
ICHTHYOLOGY	??? plant tissues worms water fish clock making