The correct answer is option 2, which states that 1 N (Newton) is equal to 1 kgm/s2 (kilogram meter per second squared).

To better understand this, let`s break down each option:

Option 1: 1 N = 1 kg/ms2

This option incorrectly uses a division sign (/) instead of multiplying (m * s2). It implies that the force is equal to the product of mass (kg) and the reciprocal of the square of time (ms2), which is incorrect.

Option 2: 1 N = 1 kgm/s2

This is the correct answer. It states that a Newton is equal to the product of mass (kg) and acceleration (m/s2), which reflects the definition of force stated in Newton`s second law of motion.

Option 3: 1 N = 1 kg s2/m

This option uses an incorrect arrangement of the variables, placing seconds squared (s2) in the numerator and meter (m) in the denominator. This incorrectly implies that force is equal to the product of mass (kg), squared time (s2), and the reciprocal of meter (1/m).

Option 4: 1 N = 1 kg m s2