Which of the following sentences contains a phrasal verb?

• Phrasal Verb:
- বাক্যে Verb + preposition/adverb থাকলে সেটা Phrasal Verb হয়।
- যেমন - look down upon, give up, look after.
- তাই এখানে Phrasal Verb (verb + preposition) হচ্ছে phrasal verb.

• I need to look after my younger brother while my parents are away.
- এই বাক্যে 'look after' (verb + preposition)
- তাই এটি Phrasal Verb.

অন্যদিকে,
• Apologizing to them is important to me: Gerund.
• Mother will not let you go.: Infinitive: 'go' এখানে 'to' বিহীন Infinitive.
• The writing of a good letter is difficult: Verbal noun: কারণ, writing এর পূর্বে the ও পরে of বসেছে।