Option 1 states that the various parallel ranges of the Himalayas form a convex arc. This means that the Himalayan mountain ranges are arranged in a curve that is bulging towards the outside. This characteristic is true and helps distinguish the geographical shape of the Himalayas.

Option 2 mentions syntaxial bends at both terminals of the Himalayas. A syntaxial bend is a type of structural deformation that occurs when a fault bends in a different direction. This is observed at the ends or terminals of the Himalayas. This characteristic is also true and helps define the geological features of the Himalayas.

Option 3 states that the Indus, Sutlej, and Brahmaputra rivers are examples of antecedent drainage in the Himalayas. Antecedent drainage refers to rivers that existed before the mountains formed and managed to maintain their course as the mountain range uplifted. This characteristic is also true and showcases the geological history of the Himalayas.

Option 4, which is the correct answer, states that the Himalayas are wider in the east than in the west. However, this statement is incorrect. In reality, the Himalayas are wider in the west and narrower in the east. This distinction is due to the tectonic forces and plate movements that have shaped