As per Section 18(3) the taxable person is entitled for input tax credit on capital goods and Inputs on Change of option from Composition Scheme to regular Scheme.

[ Read Composition Scheme under GST Analysis after CGST act 2017 ]

Extract from Section 18 (3) of Revised Model GST Law 

Where any registered taxable person ceases to pay tax under section 9 (Composition Levy) , he shall, subject to such conditions and restrictions as may be prescribed, be entitled to take credit of input tax in respect of inputs held in stock, inputs contained in semi-finished or finished goods held in stock and on capital goods on the day immediately preceding the date from which he becomes liable to pay tax under section 8:

PROVIDED that the credit on capital goods shall be reduced by such percentage points as may be prescribed in this behalf.