Deepak,
For the purposes of the SJCP exam, both keywords and reserved words are keywords. This has been pointed out by people who have taken the
test (and passed!) on this and other boards.
Keywords (SJCP): reserved identifiers that are predefined in the language and cannot be used to denote other entities.
NOTE: Unless you typed in the values incorrectly, values in a, b, and c are NOT keywords or reserved words ... all keywords or reserved words have only lower case letters. The only valid keywords (SJCP) are d, e, and f (yes keyword!) in your given list.
Manfred.