Answer:
Statement is conditional.
Explanation:
Given the statement
"If a polygon has six sides, then it is a hexagon"
Option A: Conjunction
A conjunction statement is a compound statement which is formed by joining two statements with connector AND.
Hence, not a conjunction statement
Option B: Disjunction
A disjunction statement is a compound statement which is formed by joining two statements with connector OR.
Hence, not a disjunction statement
Option C: Negation
Opposite of a given statement is negation of statement
Option D: Conditional
Conditional statement is an if-then statement
As given statement is if-then statement therefore called conditional statement.
Option D is correct