The correct option is A 4
According to section 4 of the Negotiable Instruments Act, 1881, a promissory note is defined as an instrument in writing, containing an unconditional undertaking signed by the maker, to pay a certain sum of money only to or to the order of a certain person, or to the bearer of the instrument. However, according to the Reserve Bank of India Act, a promissory note payable to bearer is illegal.