<prompt> A 45 year old farmer has itchyerythematous papular lesions on face, neck, V area of chest, dorsmn of hands and forearms for 3 years.The lesions are more severe in summers and improve by 75 in winters. The most appropriate test to diagnos.e.titil: condition would be -Skin biopsyEstimation of IgE levels in bloodphoto Patch TestIntraderrnal prick test  <response>: The photo-patch test is conducted to examine the influence of rays when a chemical substance is placed on the skin. Twenty- four to 48 hours after a material that is suspected of causing pho- tosensitive disease is pasted on the skin, the site is exposed to UV rays. Ref Harrison20th edition pg 1234 