Brain capacities of Homo erectus was around :

The correct answer is Option (1) → 900 cc

Option (1) 900 cc — Correct. Fossils of Homo erectus found in Java (1891) date to about 1.5 mya.

Option (2) 650 - 800 cc — Incorrect. This is the brain size of Homo habilis, the first human-like being.

Option (3) 1400 cc — Incorrect. This is the brain size of the Neanderthal man.

Option (4) 650 cc — Incorrect. This is the lower end for Homo habilis.

NCERT Extract:
Origin and Evolution of Man – “… Some of the bones among the bones discovered were different. This creature was called the first human-like being the hominid and was called Homo habilis. The brain capacities were between 650-800cc. They probably did not eat meat. Fossils discovered in Java in 1891 revealed the next stage, i.e., Homo erectus about 1.5 mya. Homo erectus had a large brain around 900cc.”