The father said his sons, "Don't quarrel". The indirect form of the sentence is_____

ক: "The father forbade his sons to quarrel."

- This option changes the direct speech "Don't quarrel" into reported speech using the verb "forbade." However, it incorrectly uses the infinitive "to quarrel" after "forbade." In reported speech, negative commands are usually transformed into affirmative commands. Therefore, this option doesn't accurately represent the original statement.

খ: "The father forbade his sons not to quarrel."

- Similar to option ক, this option uses the verb "forbade" but adds the negation "not" before "to quarrel." However, this creates a double negation, which is not standard in English. In reported speech, negative commands are typically transformed into affirmative commands.

গ: "The father requested his sons not to quarrel."

- This option uses the verb "requested," which implies a polite or soft command. The phrase "not to quarrel" accurately reflects the negation in the original statement. This option follows the standard transformation of a negative command into a polite request in reported speech.

ঘ: "The father told his sons not to quarrel."

- This option correctly uses the verb "told," which is appropriate for reporting statements. The phrase "not to quarrel" accurately reflects the negation in the original statement. This option follows the standard transformation of a negative command into reported speech.

Based on the rules of reported speech, option ঘ, "The father told his sons not to quarrel," is the most appropriate and accurate representation of the original statement. It uses the correct reporting verb ("told") and transforms the negative command into reported speech correctly.