When tail is cylindrical and ventral scales do not extend the entire width of the belly, the snake is

The correct option is C Non-venomous
When the tail is cylindrical, the snake is terrestrial and maybe poisonous or non-poisonous.
When the ventral or belly scales are small and continuous with the dorsal scales i.e., no difference between the dorsal and ventral scales, the snake is non-poisonous.
When the ventral scales are broad but do not cover the belly completely, it is a non-poisonous land snake.
So, the correct answer is option A,