Choose the appropriate word which can be substituted for the given sentence: 'One who sacrifices his life for a cause'.

Choose the appropriate word which can be substituted for the given sentence: 'Animals feeding on plants'.

Choose the appropriate word which can be substituted for the given sentence: '$A$ person pretending to be somebody he is not'.

Choose the appropriate word which can be substituted for the given sentence. Peter is excessively concerned with accuracy and precision. He is a

Choose the appropriate word which can be substituted for the given sentence: 'Medical study of skin and its diseases'.

Choose the appropriate word which can be substituted for the given sentence: $A$ person who has good knowledge of matters of taste such as fine arts,cuisines,music,etc.