One-third of Ratan's investment in National Savings Certificate is equal to one-half of his investment in FDR. If he has Tk. 1,50,000 as total investment, how much he invested in savings certificate?
Causes of low birth weight are-
Membrane protein acts as -
Layers of blood vessels are-
Junctional tissues of heart are-
Which step should a researcher follow before, during and after research-