Invisible Export means export of

Services
Prohibited goods
Unrecorded goods
Goods through smuggling

The correct answer is (a). Invisible exports are exports of services, such as tourism, banking, and insurance. They are called “invisible” because they do not involve the physical movement of goods across borders.

(b) Prohibited goods are goods that are not allowed to be exported, such as drugs and weapons.

(c) Unrecorded goods are goods that are exported but not recorded by the government. This can happen for a number of reasons, such as smuggling or under-reporting of exports.

(d) Goods through smuggling are goods that are exported illegally, without paying taxes or tariffs.

I hope this helps! Let me know if you have any other questions.