Walnut, long called the king of nuts, is costly, at up to Rs 170 for 100 grams.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/walnut-can-reduce-risk-colon-cancer
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-chronicle-telangana
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/telangana
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cancer
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nutrition
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health