They agreed amongst________that they would not tell anyone.

1. themselves
2. himself
3. ourselves
4. yourself

Explanation: যে pronoun গুলো personal pronoun এর 1st এবং 2nd person এর possessive adjective এবং 3rd person এর objective এর সাথে self (singular) এবং selves (plural) যুক্ত হয়ে গঠিত হয় এবং subject ও object একই ব্যক্তিকে বোঝায় তাদেরকে Reflexive pronoun বলে। যেমন: myself, yourself, himself, ourselves, herself, itself, yourselves, themselves etc. এছাড়া, বাক্যের subject ও object দুটিই একই ব্যক্তি হলে object এ reflexive pronoun বসবে। যেমন: 1) I cut myself. 2) He killed himself. 3) The heroine looked at herself in the pond. 4) They agreed amongst themselves that they would not tell anyone.