Please select the most similar patent number from A, B, C and D. Which number is?
Provided are an edible bird&#39;s nest product and preparation method thereof, comprising the following processing steps: pretreating an edible bird&#39;s nest; stewing with water, and simultaneously performing a crushing process; performing a low-temperature concentration; shaping; performing a low-temperature drying process; and obtaining an instant brewable bird&#39;s nest product.
A: Disclosed is a recombinant highland barley powder, comprising highland barley powder, black sesame, other cereal flours and food additives, wherein the mass percentage of each component is: 50%-70% of highland barley powder, 5%-15% of black sesame, 23%-35% of other cereal flours, and 7%-15% of food additives, the food additives being gum arabic and mogroside. Also involved is the use of the recombinant highland barley powder in the preparation of highland barley products in the food field. Further involved is a method for preparing a low GI recombinant highland barley granule, the method comprising using the recombinant highland barley powder as a raw material, extruding the powder at low temperature and cutting the extruded powder and forming same, and then subjecting the powder to drying and cooling, wherein the low-temperature extrusion includes five temperature control sections, with the fifth section having a temperature of 55℃-70℃, and the temperature of the other sections successively decreasing by 10℃. Further involved are a recombinant highland barley granule prepared by this method and the use of the recombinant highland barley granule in making steamed buns, biscuits and flour-based products.
B: A processing method for removing nitrite from bird&#39;s nest comprises: thoroughly purifying water with an active filter medium, and sufficiently immersing in the purified water and then air-drying bird&#39;s nest for three times.
C: A Folium Apocyni Veneti extractive preparation method, comprising: cold-drying, grinding, sifting, and degreasing Folium Apocyni Veneti, to obtain a filter cake; drying the filter cake, adding the filter cake to absolute ethyl alcohol for ultrasonic extraction, and performing filtering to obtain an extract solution and residue; performing multi-stage countercurrent pulse extraction on the residue to obtain an extract liquor; after mixing the extract liquor and the extract solution, treating the mixture with a macroporous absorption resin, and then performing eluting by using water and ethyl alcohol in sequence, concentrating, and drying, to obtain a Folium Apocyni Veneti extractive. Specific operations of the multi-stage countercurrent pulse extraction comprises the following steps: conveying the residue into an extractor, and performing N-stage spraying and soaking extraction on the residue by using an extracting agent of the Folium Apocyni Veneti extractive, to obtain the extract liquor and residual dregs; and the mass fraction of the Folium Apocyni Veneti extractive in an extracting agent used in the M th  stage is higher than the mass fraction of the Folium Apocyni Veneti extractive in an extracting agent used in the (M-1) th  stage, where 2≤M≤N. The method features a high extraction speed, high extraction precision, and low production costs, and reduces the energy consumption.
D: A fritillary flower extractive preparation method, comprising the following steps: cold-drying, grinding, sifting, and degreasing fritillary flowers, to obtain a filter cake; drying the filter cake, adding the filter cake to absolute ethyl alcohol for ultrasonic extraction, and performing filtering to obtain an extract solution and residue; performing supercritical carbon dioxide extraction on the residue to obtain an extract liquor, using ethanol water as entrainer; after mixing the extract liquor and the extracting solution, treating the mixture with a macroporous absorption resin, and then performing eluting by using water and ethyl alcohol in sequence, concentrating, and drying, to obtain a fritillary flower extractive. During the supercritical extraction, the extraction temperature is 52-55°C, the temperature of the first separation is 45-50°C, the temperature of the second separation is 35-40°C, the extraction pressure is 30-33 MPa, the flow rate of carbon dioxide is 10-20 L/h, the frequency of receiving a product is 45-50 min per time, and the extraction time is 3-4 h. The method features a high extraction speed, high extraction precision, and low production costs.
Answer: B