Solution:Against a key word is given four suggested meanings. Choose the correct word or phrase which is meaning to the key word.Retentive (Adjective) = able to remember things very easily; not forgetful.
Look at the sentence: He had a most retentive memory and a very keen power of observation.
Secretive (Adjective) = liking to keep things secret from other people.
Experimental (Adjective) = connected with experiments or trying new ideas.
Grasping and greedy (Adjective) = avaricious; showing a strong desire for especially material possessions.