There is a sentence that is missing in the paragraph below. Look at the paragraph and decide in which blank (1, 2, 3, or 4) the following sentence would best fit. Sentence: Internet addiction is a modern affliction spreading wide as our society becomes increasingly dependent on it. The US and China have started rehabilitation centres for compulsive users of the internet and even India must consider proactive measures with regard to this problem. ____1_____. It is no longer a mere medium of communication but is evolving into a virtual reality. ___2______. Neuropsychiatric opinion holds that internet addiction is like substance abuse. ____3______It thrives on instant gratification and can cause behavioral alterations. _____4______