Value of g increases with the (a) increase in mass of the body
(b) increase in altitude
(c) decrease in altitude
(d) none of the above

why do I think that option a and c are correct becoz

as per me option a and c

as directly proportional to mass and inversely proportional to square of distance

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.