The teaching activity undertaken by Bell was considered 'nobel' particularly because ----.

He was teaching the physically under privileged persons

He was working for the betterment of the deaf and the dumb

He established a school for the deaf and the dumb- the first of its kind

He was a very famous scientist of his times

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

ব্যাখ্যা ও সঠিক সমাধান

উত্তর: He was working for the betterment of the deaf and the dumb

বিস্তারিত সমাধান