What nickname is given to 1960s sports cars?

Here is the question :

WHAT NICKNAME IS GIVEN TO 1960S SPORTS CARS?

Here is the option for the question :

Smooth operators
Choppers
Muscle cars
Skiffs

The Answer:

And, the answer for the the question is :

MUSCLE CARS

Explanation:

[STC0010771]. In the 1960s, a range of two-door sports cars such as the Chevrolet Corvette came to be known collectively as “muscle cars,” which was a popular term at the time. These automobiles often had powerful V8 engines and rear-wheel drive, as they were meant for high levels of performance and fast speeds. The majority of classic muscle cars were manufactured in the 1950s and 1960s because vehicle manufacturers began transitioning to more fuel-efficient (albeit less powerful) V6 engines in the 1970s.