Answer:
Correct option is (a)
Explanation:
TLD is abbreviation for top level domain which is the last part of a website's address after its domain name. It appears after 'dot', for example .com, .edu, .org and .in. So, TLD in these cases are com, edu, org and in.
TLDs identify a website's purpose or its geographical location and is managed by assigned organization which is directed by ICANN (Internet Corporation for Assigned Names and Numbers).
So, purpose of TLD is to identify organization type related to the domain.