Answer:
Option B is correct.
Explanation:
Given the statement
All lines are straight or a triangle has four sides.
we have to choose the correct word for the above statement.
Conjunction statement is a compound statement formed by joining two statement with connector AND and Disjunction statement with connector OR.
Negation statement is the opposite of given statement.
Conditional statement is if-then statement.
The given statement is the compound statement formed by joining two statements with connector OR
⇒ The given statement is disjunction
Option B is correct.