Consider the following statements :
1. 10 minims of tincture and 90 minims of alcohol give 1st centesimal potency.
2. 6 minims of tincture and 99 minims of dilute alcohol, the drug power of tincture being 1/6 give 1st centesimal potency.
3. Preparation of mother tincture consists in three steps viz; Estimation of plant moisture content, meceration and percolation.
4. Drugs like bufo rna, murex, apis, phytolacca, helleborous and naza, all belong to animal kingdom.
Which of the statement's given above is/are correct ?