The correct answer is option 3: Himalayan frontal faults (HFF) separates Himalaya from Tibet.

Option 1 states that the Himalayas are young fold mountains. This is correct. The Himalayas are relatively young compared to other mountain ranges and were formed by the collision of the Indian and Eurasian tectonic plates.

Option 2 states that the Himalayas have geosynclinal rocks. Geosynclinal rocks are typically found in older mountain ranges, so this statement is incorrect. The Himalayas are mainly composed of sedimentary rocks.

Option 3, as mentioned earlier, is incorrect. The Himalayan frontal faults do not separate the Himalaya from Tibet. In fact, the main boundary between the Himalayas and Tibet is the Great Himalayan Thrust, not the Himalayan frontal faults.

Option 4 states that the Indus and Sutlej rivers form antecedent drainage in the Himalayas. This is correct. Antecedent drainage refers to rivers that have maintained their course of flow across a rising mountain range. The Indus and Sutlej rivers are examples of antecedent rivers in the Himalayas.

In summary, option 3 is the correct answer because the statement about the Himalayan frontal faults