Cost of living Index number (C.L.I.) is expressed in terms of:

• A. \(\frac{{\sum {{p_n}{q_0}} }}{{\sum {{p_0}{q_0}} }} \times 100\)
• B. \(\frac{{\sum {{p_n}{q_n}} }}{{\sum {{p_0}{q_0}} }}\)
• C. \(\frac{{\sum {{p_0}{q_n}} }}{{\sum {{p_n}{q_n}} }} \times 100\)
• D. None of these