Which of the following statements are correct with respect to Arunachal Himalaya? Statement 1: These extend from the east of the Bhutan Himalayas up to the Diphu pass in the east. Statement 2: The general direction of the mountain range is from southwest to northeast. Statement 3: Some of the important mountain peaks of the region are K2 and Annapurna. Statement 4: These ranges are dissected by fast-flowing rivers from the north to the south, forming deep gorges.