Which of the following statements about the Arya Samaj which emerged in the late 19th century are correct? 1. Had a very strong support base amongst the trading castes. 2. Introduced ‘shuddhi’ or mass purification. 3. The moderates in the Arya Samaj were headed by Hans Raj and Lajpat Rai and set up a chain of Dayanand Anglo-Vedic colleges. 4. The Arya Samaj had fewer members than the Brahmo Samaj.