Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

[EX Q]: Abstract: The relationship between air flow at 38 degrees C and area colour change on a flexible liquid crystal film was found to be virtually linear between the values of 1 and 31 min-1 cm-2. This value of flow per unit area corresponded to values expected at the level of the nostril during quiet breathing. A series of 6 subjects were asked to breathe over a flexible liquid crystal film regularly during the day and the area of colour change produced by flow from each nostril was examined. Four subjects showed a regular change in relative flow through each nostril whilst 2 subjects showed a constant flow through each nostril. This simple and non-invasive technique provides a method of examining the nasal cycle in adults and children in health and disease.
Which is the apt title for the abstract? option1: A non-invasive method of demonstrating the nasal cycle using flexible liquid crystal thermography. option2: Recovery of human neutrophils from complement attack: removal of the membrane attack complex by endocytosis and exocytosis.
[EX A]: A non-invasive method of demonstrating the nasal cycle using flexible liquid crystal thermography.

[EX Q]: Abstract: Of 68 patients with unclippable aneurysms treated by proximal artery occlusion with detachable balloons, permanent occlusion was achieved in 65; of these patients, 37 had carotid artery aneurysms below the origin of the ophthalmic artery, 21 had aneurysms arising from the supraclinoid portion of the carotid artery, six had basilar trunk aneurysms, and one had a distal vertebral aneurysm. Examination for treatment selection included assessment of the circle of Willis by compression angiography and xenon blood flow studies, with the ultimate evaluation being test occlusion under systemic heparinization with the balloon temporarily placed in the desired position. Of 67 patients who underwent a formal occlusion test, eight with carotid artery aneurysms did not initially tolerate the occlusion test, and ischemic signs disappeared instantaneously with deflation and removal of the balloon. During test occlusion, two additional patients had ischemic events that proved to be embolic; these reversed immediately upon balloon deflation. Of the 65 patients in whom permanent occlusion was effected by detachable balloon, there were nine instances of delayed cerebral events. One of these was a seizure leading to respiratory arrest and resuscitation 3 days following occlusion in a patient who had presented with seizures. The other eight cases were delayed ischemic events; seven were completely reversed and one patient had residual weakness in one leg (1.5% permanent morbidity). Extracranial-intracranial bypass procedures were performed in 25 of the 65 cases. All aneurysms of the carotid artery below the level of the ophthalmic artery presented angiographic proof of complete thrombosis. Ten of 21 aneurysms arising from the supraclinoid portion of the carotid artery were completely thrombosed by proximal occlusion alone, without additional trapping procedures. Similarly, in three of six basilar trunk aneurysms, proximal occlusion alone initiated complete aneurysm thrombosis without trapping. The conclusion is that proximal balloon occlusion for unclippable cerebral aneurysms is a convenient, safe, and effective way of producing arterial occlusion in these cases.
Which is the apt title for the abstract? option1: Use of detachable balloons for proximal artery occlusion in the treatment of unclippable cerebral aneurysms. option2: Breast cancer risk in relation to early oral contraceptive use.
[EX A]: Use of detachable balloons for proximal artery occlusion in the treatment of unclippable cerebral aneurysms.

[EX Q]: Abstract: Plastic bronchitis is an uncommon disease of children characterized by the formation of long, branching bronchial casts. Of three children with such bronchial casts, one developed status asthmaticus and coughed out a complete cast of the tracheobronchial tree. One other child also had a course of desensitization for allergies. Two children presented with what was originally thought to be pneumonitis, but when chest x-rays were taken, one child was suspected of having an inhaled foreign body, and the other had complete opacification of one lung. When these two children were examined bronchoscopically the tracheobronchial tree was found to be filled with white, cheesy material. This material was extremely hard to remove bronchoscopically as the material was too soft to grab with forceps but too thick to suction. The material extended all the way down into the tertiary bronchi, and in one child multiple bronchoscopies were necessary to remove this material, and even so he developed bronchiectasis. The pathologic examination of these casts showed layers of inspissated mucus and inflammatory cells.
Which is the apt title for the abstract? option1: Plastic bronchitis. option2: Selected endourologic techniques.
[EX A]:
Plastic bronchitis.