Question
How can amoebiasis be prevented?
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| Column A | Column B (Symptoms observed) |
| (1) Deficiency of Cu | (a) Malformed leaves |
| (2) Deficiency of Bo | (b) Leaves with yellow edges |
| (3) Deficiency of Zn | (c) Brown heart disease |
| (4) Deficiency of K | (d) Die back of shoot |
| Column I [Contraceptive method] | Column II [Mode of action] |
| (1) Pill | (a) Prevents sperms reaching cervix |
| (2) Condom | (b) Prevents implantation |
| (3) Vasectomy | (c) Prevents ovulation |
| (4) Copper T | (d) Semen contains no sperms |
| Column A (Scientist) | Column B (Theory) |
| (1) Dixon and Joly | (a) Starch-sugar inter conversion |
| (2) Steward | (b) Osmotic absorption theory |
| (3) Atkins and Pristley | (c) Non-osmotic absorption theory |
| (4) Kramer and Thimann | (d) Cohesion tension theory |